So my question is, could a guy just connect the posts coming into the module with the posts that power the head lights and eliminate the module?

At some point, the used good modules are going to be non-existent, and the new ones might be gone from the market as well, the trucks are already 20 years old, or very near 20 years old.

I don't see why you couldn't go directly from the fuse to the headlight lights and eliminate the module and the printed board before it. What am I missing?